For decades, scientists believed that lead-208 (²⁰⁸Pb), the heaviest known "doubly magic" nucleus, was perfectly spherical. New research, however, has shattered that assumption. An international team ...

New evidence The discovery of electrons. Changes to the atomic model Atoms can be broken down into smaller parts. An atom is made of tiny negatively charged electrons dotted about a positively ...

Everything we can see and touch, and quite a lot that we can’t as well, is made of tiny particles called atoms. Some substances, like particles of this iron, contain only one kind of atom.